Analysis of multi-storey buildings with and without floating columns by using construction sequence analysis in different seismic zones in India

Abstract

In recent times multi-storied urban constructions require no-column space due to several reasons such as space, population, and aesthetic requirements. Especially by placing floating columns at baselevel provide us column free space for parking and free movement of vehicles. These structures often have floating columns, which can be dangerous in actives seismic zones. This study examines the detrimental impacts of floating columns in multi-storey buildings using construction sequence analysis (CSA) in different seismic zones as prescribed in Indian standard code of practice. The study compares designs of multistorey structures with and without floating columns for various seismic zones and determine storey displacement, storey shear, storey drift, Response spectrum, The findings show that installing floating columns in zones 2 and 3 is allowed, when necessary, as displacement values produced are within allowable limits. However, installing floating columns in zones 4 and 5 causes displacement values to exceed allowable ranges. To develop a safe and economically advantageous floating column construction, the structure should be strengthened with special remedial features like shear wall, bracings, and dampers.